Electric lock



(No Model.)-

F. MORGENTHALBR.

ELECTRIC LOCK. No. 475,137. Patented May 17,1892.

* WlT/VESSES: 77 I m/ VE/VTOH Mm w y 60% ATTORNEYS.

UNTTEED STATES PATENT O F CE.

FREDERICK MORGENTI-IALER, OF BROOKLYN, NEW YORK.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 475,137, dated May 17,1892.

Application filed September 10, 1891. Serial No. 405,283. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK MoReEN- THALER, of Brooklyn, in the countyof Kings and State of New York, have invented a new and ImprovedElectric Locking Attachment, of which the following is a full, clear,and exact description.

My invention relates to improvements in that class of door-lockingattachments which are adapted to be secured to a door and lock it ineither an open or closed position and which are electrically operatedand controlled by push-buttons arranged in different parts of thebuilding, so that if a thief should snatch anything from the buildingand attempt to escape one of the attendants may press a push-button andclose and lock the door before the thief can escape.

My invention is especially intended as an improvement on the UnitedStates Letters Patent issued to Herman J. Meyers,-No..

427,341, dated May 6, 1890.

This invention relates more particularly to the mechanism for holdingthe door open and forreleasing the door, the object being to simplifythe construction shown in the above patent and to provide a positivemeans for accomplishing the above'result.

To this end myinvention consists in certain features of construction andcombinations of parts, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a sectional side elevation of the locking attachment,showing it in position to hold the door open. Fig. 2 is a similar view,but with the door shut and locked; and Fig. 3 is a broken plan showingthe general arrangement of the lockingattachment and door.

The lock-casing 10 is provided with a swinging lid 11, and itis securedto the inner side of the door 12 near the top, and the door to which thecasing is secured is pressed by a spring 13 or similar device, so thatit will close.

itself. Projecting laterally from the outer side of the casing 10 andpivoted in a recess 14 in the casing is a latch 15, having a rounded endand a shoulder 16 near the end, which shoulder is adapted to fall intoengagement with the catch 17, which is secured to a wall 18 or 7 slottedplate 21, which is secured by a screw 22 to a movable bar 23, and bymeans of the screw the plate may be adjusted so that the pin 20 willstrike the inner end of the latch at any desired point. The upper end ofthe movable bar 23. is pivoted to an armature 24, which is operated bythe electro-magnets 25, and which is pivoted at one end to a support 24.The lower end of the movable bar 23 is pivoted to a lever 26, whichextends horizontally across the bottom portion of the case, beingpivoted on a lug 27, and the throw of this lever is limited bya screw28, which proj ects through the case-bottom and which may be easilyadjusted. The inner end of the lever 26 is pivoted to the spring-pressedshank 29 of the sliding bolt 30, which moves vertically in the slideway31, and is adapted to engage a Y catch 32, which projects inward fromthe doorcasement 33, and enters an opening 34 in the lock-case 10, t

The construction just described is adapted to lock the door in a closedposition, and the arrangement of the sliding bolt and its connectionwith the armature is substantially like that shown in the patent abovereferred to. The electro-magnets 25 are mounted on a support 25 withinthe case 10, and connection is made with them throughbinding-posts 35,(see Fig. 3,) and the wires are arranged in a battery-circuit andconnected with push-buttons in various partsof the store or building inthe manner described in the above patent.

The operation of the device is as follows: Fig. 1 shows the normalposition of the apparatus, and when the door is pushed open the latch 15engages the catch 17 and the door is held in open position. It will benoticed that when in this position the sliding bolt 30 is drawn downwardin the slideway 31. When the door is to be closed, however, thepushbutton is operated so as to close the circuit through the magnets25, and the magnets pull downward on the armature 24, which depressesthe movable bar 23, bringing the pin 20 in contact With the inner end ofthe latch 15, thus raising the outer end of the latch from the catch 17.The spring 13 then closes the door, and as the downward movement of thearmature has thrown upward the sliding bolt 30 (see Fig. 2) the boltwill engage the catch 32 above the door and the door will be locked in aclosed position.

Having thus described my invention, I claim as new and desire to secureby Letters Patent bar pivoted to the free end of the armature andprovided with an adjustable pin, a laterally-extending latch pivoted inone Wall of the case and having its free end arranged in the path of thepin, and a catch secured to an adjacent support and adapted to engagethe latch, substantially as described.

3. An electric locking attachment for doors, comprising a case adaptedto be secured to a door, electro-magnets secured within the case andprovided with a swinging armature, a movable bar pivoted to, the freeend of the armature and adapted to move parallel to one side of thecase, a plate adjustably secured to the movable bar and provided with aprojecting pin, a latch pivoted in the adjacent wall of the case andhaving one end arranged in the path of the pin, and a catch secured toanadjacent support and adapted to engage the latch, substantially asdescribed.

FREDERICK MORGENTHALER.

\Vitnesses: v

WARREN B. HUTCH'INSON, C. SEDGWIOK.

